是否有任何真正可用于云计算的可断开连接的 Web 解决方案？
云计算提供了很多优势（我目前喜欢 Google 的 App Engine），但遇到了客户的抵制，他们担心将业务平台建立在互联网上（而不是互联网服务器）会在互联网临时中断期间危及员工的工作效率。 是否有任何可用的解决方案涉及将数据缓存/复制到内联网服务器，或者真正“可断开连接”的基于网络的解决方案，以便企业用户可以在互联网中断期间进行操作？ 您知道符合此要求的任何宏观设计模式或组件或解决方案吗？
Cloud computing offers a lot of up-side (I currently favour Google’s App Engine), but have encountered resistance from customers who are worried that basing their business platform on the Internet (as opposed to internet servers) would risk staff productivity during temporary internet outages.
Are there any solutions available that involve caching/replicating data to an Intranet server, or web based solutions that are truly “disconnectable” such that corporate users could operate during Internet outages?
Do you know of any macro design patterns or components or solutions that fit this bill?
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Eucalyptus 似乎是目前开源私有云的首选软件。它与亚马逊的云服务兼容。
Eucalyptus seems to be the go-to software for open source private clouds at the moment. It's compatible with Amazon's cloud services.
这在很大程度上取决于您的应用程序需求和设计。
如果您拥有真正的分布式架构，那么您似乎可以在客户的办公室以及云提供商的虚拟机基础设施中运行节点。您将必须处理多主配置中始终存在的所有断开操作冲突解决问题。
如果您要使用“云”，似乎更好的解决方案是拥有多个出站网络连接，并将您的应用程序托管在多个提供商的云基础设施中。
宏观设计模式是“无单点故障”。
This is highly dependant on your application needs and design.
If you have a truly distributed architecture, it would seem that you can run a node in your client's office as well as in the cloud provider's VM infrastructure. You will have to deal with all the disconnected operation conflict resolution issues that have always been present in multiple-master configurations.
If you are going to the "cloud", it would seem the better solution is to have multiple outbound network connections, and host your application in more than one provider's cloud infrastructure.
The macro design pattern is "no single point of failure".